Process of manufacturing composition applicable for electric insulation.



106. COMPOSITIONS,

COATING OR PLASTIC.

Cross WILLIAM JAMES CORDNER,OF LONDON, ENGLAND, ASSIGNOR TO LOUIS D.

.BRANDEIS, TRUSTEE, OF BOSTON, MASSACHUSETTS.

PROCESS OF MANUFACTURING COMPOSITION APPLICABLE FOR ELECTRIC INSULATION.

srncmca'non forming s of Letters Patent No. 654,951, dated JulyApplication filed mm 17,1899. Serial Kc. 735,908. or omma To all whom itmay concern.- Be it known that 1, WILLIAM JAMES Gonn- NER, a subject ofthe Queen of Great Britain and Ireland, residing at London, haveinvented a new and useful Improvement in Processes of ManufacturingEngland,

9. Composition Applicable for Electric Insulation and other Purposes,(for which I have made application for Letters Patent in Great Britainunder No.

following is aspecification.

13,846 and date of July 4, 1890,) of which the This invention relatestothe manufacture of a composition'from rhea fi her applicable forelectric insulation and other purposes,

such as the manufacture of like, and has of a material insulator incomparison to its thickness, which is practically a non-absorbent whichcan be'produced at a 10 -To carry my invention into effect, the rhea,

rities b; w" as? fiber is first cleansed'from impu of water, and

w cost.

"'l'mnd r 1 e 1 any of the we ways, suEFfl'Ty treatment with carbonatefsoda and if the a I.

"in High-class insulation it may be necessary to degum the process, mentunder degumming or the material before commencing hereinafter described,by treatthe Gomespatented process of by other equivalent means.

After the'above-described preliminary treatment the rhea fiber ofsilicate of soda of a density of mm e exact density being dependamountof gum in the fiberthe greatest density of 20 I Baum is only used whenthe fiber has been 7 aume, out upon the for example,

is immersed in a solution thoroughly degummed. When the fiber isoarefull dried in a suitable oven or drying-room at Temperaso thoroughlysaturated, it is tures commencing at 80 and rising to 250 Fahrenheituntilrall the moisture has en he fiber is next immersed in at until ithas taken up all the 01 it can possid from the oilbath and placed into amachine, such as a a temperature of 300 Fahrenheit and the superfluousoil is extracted.- The fiber is then suspended in a drying-room andthoroughly dried in a temperature of 250 Fahrenheimfl'l' of sma andheavy hydrocarbon on the fiber it has assumed the character of purehydrocarbon cellulese. It is then carefully examined and the parts thathave not assumed the desired character-41. 2., a complete transformationinto cellulose-are removed and retreated to the hydrocarbon bath andextraction processes and again put into the drying-room. in the mannerdescribed, it-is thoroughly treated mechanicallyin a dry mixer until theoriginal fibrous formation ofthe'material has entirely disappeared. Itis now ready for incorporation with oils similar materials-such as I oilrubber-oil balataindia-ru er an n a-erca-accor mg 0 s class of mater a Ies re. For example, if hard material is required an excess of resinousgums is mixed with the cellulose, or if soft and flexible material isrequired a larger amount of readily-oxidizable oil is incorporated, theoil being first treatedand thickened with oxygen gas, given off by blackoxid of manganese when heated. This method imparts no disagreeablesmell'to the resultant product. For cable insulation, where a very highreto add a small portion of gutta-percha; but this is not necessary forpurposes of ordinary insulation. In asimilar sense the heavyhydrocarboncellulose maybe employed to load india-rubber.

Having now describedmy invention, what out, is--- in a solution ofsilicate of soda of a density of 15 .to 20 Baum,th edrying of same to eI t 5 bath of resiuor other heav h drocarbon oil A process for themanufacture of a compoat a tem'p'e ra'ture of a'Fou't EEEQnE sitionconsisting of treatment of rhea fiber,

sins ums and ll'lSBGl'iOll resinum 20H iana gum,

which is advantageously 80 I claim, and desire to secure by LettersPat-- EXAMINER hydroextractor or press, which is worked in 50 'Havingformed the cellulose sistanco is required, it is sometimes advisable 5extract the moisture, the saturation of the the like to form a compositematerial, subflber, with a heavy hydrocarbon such as resinstantially asdescribed. 1o oil and the like, the removal of superfluous In witnesswhereof I have hereunto set my heavy hydrocarbon, the treatment by heatof hand in presence of two witnesses. -5 the saturated fiber totransform it into a WILLLQM J AMES- CORDN ER. heavy hydrocarboncellulose, the disintegra-. -WTituesses:

tion of the said cellulose and the mixture H. E. DENNY, therewith ofgums,'resins, oxidizable oils and CHARLES CARTER.

